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Cheap flights from South Dakota to Idaho Falls from $143

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from South Dakota to Idaho Falls departing on 9/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from South Dakota to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
4:41 pm - 9:18 pmRAP  Rapid City-IDA Idaho Falls Fanning Field
4h 37m1 stop Denver Intl
United Airlines Logo
4:04 pm - 12:24 pmIDA  Idaho Falls Fanning Field-RAP Rapid City
20h 20m1 stop Denver Intl
$613United Airlines
Mon, Aug 31 - Fri, Sep 4

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Customize your flight search to find flights from South Dakota to Idaho Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 16, 2026.
Use the filters below to find and compare flights from South Dakota to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Rapid CityIdaho Falls

RAP Rapid City - IDA Idaho Falls Fanning Field

RAPIDA

Rapid City

Mon 8/31

4:41 pm-9:18 pm

1 stop4h 37m

Idaho Falls Fanning Field

Fri 9/4

4:04 pm-12:24 pm

1 stop20h 20m

$613
Cheapest one-way

Rapid CityIdaho Falls

RAP Rapid City - IDA Idaho Falls Fanning Field

RAPIDA

Rapid City

Thu 9/10

12:36 pm-11:50 am

1 stop23h 14m

$143

Rapid CityIdaho Falls

RAP Rapid City - IDA Idaho Falls Fanning Field

RAPIDA

Rapid City

Thu 9/10

12:36 pm-5:47 pm

2 stops29h 11m

$242
Quickest one-way

Rapid CityIdaho Falls

RAP Rapid City - IDA Idaho Falls Fanning Field

RAPIDA

Rapid City

Sat 10/31

7:00 am-1:28 pm

1 stop6h 28m

$264

Rapid CityIdaho Falls

RAP Rapid City - IDA Idaho Falls Fanning Field

RAPIDA

Rapid City

Thu 9/10

12:36 pm-4:47 pm

3 stops28h 11m

$318

Rapid CityIdaho Falls

RAP Rapid City - IDA Idaho Falls Fanning Field

RAPIDA

Rapid City

Sat 10/31

1:30 pm-2:28 pm

2 stops24h 58m

$505

Rapid CityIdaho Falls

RAP Rapid City - IDA Idaho Falls Fanning Field

RAPIDA

Rapid City

Sat 10/31

1:30 pm-2:28 pm

3 stops48h 58m

$1,903

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from South Dakota to Idaho Falls

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from South Dakota to Idaho Falls Fanning Field?

Allegiant Air and United Airlines are the most popular carriers operating from South Dakota to Idaho Falls Fanning Field

Cheap South Dakota to Idaho Falls flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from South Dakota to Idaho Falls

Fastest flight time

4h 51m

Direct flights

None
The fastest flight from South Dakota to Idaho Falls takes 4h 51m
There are no direct flights from South Dakota to Idaho Falls. There are no popular flight routes from South Dakota to Idaho Falls.
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Frequently asked questions about flying from South Dakota to Idaho Falls

  • When did momondo last update prices for flights from South Dakota to Idaho Falls Fanning Field Airport?

    Prices for flights from South Dakota to Idaho Falls Fanning Field Airport are updated daily.

  • How old do you have to be to fly from South Dakota to Idaho Falls Fanning Field Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from South Dakota to Idaho Falls Fanning Field Airport.

  • What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

    The necessary travel and health documents for your Idaho Falls Fanning Field Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from South Dakota to Idaho Falls

Compare and see reviews for airlines that fly from South Dakota to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $381Free CancellationRating
7.4
10,105 reviews
Search United Airlines flights

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

Why use momondo?

Why should I use momondo to find a flight deal from South Dakota to Idaho Falls?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from South Dakota to Idaho Falls for you.

Can I find flights from South Dakota to Idaho Falls with flexible booking policies on momondo?

Flights from South Dakota to Idaho Falls with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from South Dakota to Idaho Falls?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Idaho Falls from South Dakota.

I’m not ready to book a flight from South Dakota to Idaho Falls right now. Can momondo alert me if prices change?

Price alerts on flights to Idaho Falls from South Dakota are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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